Combination coaster and ring sizer



FIG. 1 is a top plan view of a combination coaster and ring sizer showing my new design;

FIG. 2 is a bottom plan view thereof; and,

FIG. 3 is a side elevation view thereof.

The broken lines and the area within them depict portions of the combinations coaster and ring sizer that form no part of the claimed design. 

CLAIM The ornamental design for a combination coaster and ring sizer, as shown and described. 